Tim Pearce wrote:
Hi Guys,
After experimenting a bit more I think the issue was my test setup.
Previously I was using python to setup a USRP Source (with timestamps)
and save both the samples (64 bit) and timestamps (32bit) to a file
sink to process by importing with numpy and checking timestamps later.
At 25MHz thats ~ 300MB/sec of data, which is substantially more than
machines disk, which is probably about 20MB/sec max.
Don't have a good answer on the thread-safety question - but one method
I've used when I want to collect a bunch of data for a limited period of
time is mount a ram disk/tmpfs. E.g. I'd do something like:
$ mkdir /tmp/shm
$ sudo mount -t tmpfs tmpfs /tmp/shm
$ usrp2_rx_cfile -e <interface> -f <frequency> -N <big number here>
/tmp/shm/data.dat
Cheers,
Tim
Doug
--
Douglas Geiger
Code 5545
U.S. Naval Research Laboratory
Washington, DC 20375
(202) 767-9048
[email protected]
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